Regardless of head coach John Harbaugh saying the left guard position is open, it really isn't because Williams is the starter. Barring injury, he'll be in the lineup in the season opener.
When he was with the Bengals, Williams used to play well against the Ravens and he got an endorsement from Ravens defensive tackle Haloti Ngata during the offseason.
Rookie guard Kelechi Osemele, who the Ravens drafted in the second round out of Iowa State, has good potential but needs a year in the weight room to become faster and stronger. Williams would be a good one-year teacher before turning the job over to Osemele.
Wragge started eight games for the Rams last season. He is good insurance for veteran starting center Matt Birk, who struggled physically at the end of last season.
The Ravens drafted Delaware center Gino Gradkowski in the fourth round in April but he is more of a project than a legitimate backup. He reminds me of former Ravens center Mike Flynn when Flynn entered the league. Flynn was slow and small, but worked his butt off in the offseason to become a starter. Gradkowski has to follow the same path, and it might take him two to three years to reach that point.